Where does “frost” come from?

frost (Old Frisian) comes from Proto-Germanic frustaz, from Proto-Indo-European prustós — frost.

Ancestry of “frost”, step by step

StepLanguageWordMeaning
1Proto-Germanicfrustazcold; frost; freezing weather; frost; rime
2Proto-Indo-Europeanprustósfrost

Words derived from “frost”

Every word from Proto-Indo-European prustós →Every word from Proto-Germanic frustaz →
frost — Etymology, Origin & Word History | Etymology Explorer